Question: When did the marriage between Maya Plisetskaya and Māris Liepa end?
Paraphrase: When was the end of the marriage between Maya Plisetskaya and Māris Liepa?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q460756 p:P26 ?s . ?s ps:P26 wd:Q2637804 . ?s pq:P582 ?value}